#231837
Closest named color: Oxford Blue (#1B263B). oklch(24% 0.059 298.2), rgb(35, 24, 55).
Aa
White text reads best on this color (16.70:1).
About this color
#231837 is a very dark, muted purple. In OKLCH its lightness is 24%, its chroma 0.059 and its hue 298°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.045 away. White text reads best on it, at 16.70:1.
| Hue family | Purples |
| Lightness | very dark (24%) |
| Chroma | muted (0.059) |
| Temperature | in between |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.25:1 |
| White text | 16.70:1 |
Values
| HEX | #231837 |
| RGB | rgb(35, 24, 55) |
| HSL | hsl(261, 39%, 15%) |
| OKLCH | oklch(24% 0.059 298.2) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #231837 | 16.70:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #231837 | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #231837 text on white | 16.70:1 | AAA | Lc 103.5 | Preferred for body text |
| #231837 text on black | 1.25:1 | Fails | Lc 0.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 950.
-
Step 50
50
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#EBE7F6
oklch(93.5% 0.021 298.2)
-
Step 200
200
#DCD4F0
oklch(88.5% 0.039 298.7)
-
Step 300
300
#C6B7E8
oklch(80.8% 0.07 298.8)
-
Step 400
400
#A991DD
oklch(70.7% 0.111 298)
-
Step 500
500
#9574D3
oklch(63.1% 0.142 298.3)
-
Step 600
600
#805AC0
oklch(55.5% 0.155 298.4)
-
Step 700
700
#6C4AA6
oklch(49.1% 0.143 298)
-
Step 800
800
#583D86
oklch(42.7% 0.118 298.3)
-
Step 900
900
#48356C
oklch(37.7% 0.093 297.7)
-
Step 950
950 (this color)
#231837
oklch(24% 0.059 298.2)
#231837 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #0E1E38 | 0.038 |
| Deuteranopia (no green cones) | #101E36 | 0.036 |
| Tritanopia (no blue cones) | #1F1E24 | 0.047 |
| Achromatopsia (no color) | #1E1E1E | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231837
#231837
oklch(24% 0.059 298.2)
- #1D2300
#1D2300
oklch(24.2% 0.057 118.8)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #231837, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.045
- Dark #1B2431 ΔE 0.045
- Rich Black #0D1B2A ΔE 0.048
- Dark Purple #35063E ΔE 0.056
- Eggplant #380835 ΔE 0.056
- Midnight Purple #280137 ΔE 0.056
- Very Dark Purple #2A0134 ΔE 0.057
- Jet #212529 ΔE 0.057
Use #231837 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.